update helpernode tag

[schabrolles]

Update helpernode tag default variable to avoid ansible helpernode issue (critical_services: redhat-cop/ocp4-helpernode#300)

[ppc64le-cloud-bot]

Hi @schabrolles. Thanks for your PR.

I'm waiting for a ocp-power-automation member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[schabrolles]

/assign @cs-zhang
/assign @Prajyot-Parab
/assign @yussufsh

[yussufsh]

/lgtm

[yussufsh]

/ok-to-test

[Prajyot-Parab]

/approve

[ppc64le-cloud-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Prajyot-Parab, schabrolles, yussufsh

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